Contact lens



FIG. 1 is a front elevational view of a contact lens showing my new design; the broken lines showing the eye of the wearer is for illustrative purposes only;

FIG. 2 is a front view of a contact lens showing my new design;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof; and,

FIG. 5 is a right side view thereof. 

The ornamental design for a contact lens, as shown and described. 